Locking hinge



" Dec. 28 1926. 1,612,462

J. w. MUMFORD LOCKING HINGE Filed Feb. 8. 1924 ATTORNEYS.

' ring to the drawings:

Patented Dec. 28, 1926.

JOHN \V. MUMFOR'D, OF PHILADELPHIA, PENNSYLVANIA.

LOCKING HINGE.

Application filed February a, 1924. Serial No. 691,375.

My invention consists of a hinge which is composed of butts or leavesand knuckles, the latter being provided with series of interengagingtongues and grooves adapted to lock said knuckles and consequently thehinge, and thus the article to which a hinge is applied in variouspositions say in the fully opened and closed and partly opened andclosed condition of said article as will be found desirable in the caseof cabinet tops or covers, desk lids, and the like.

The invention is satisfactorily illustrated in the accompanying drawing,but the important instrumentalities thereof may be varied, and so it isto be understood that the invention is not limited to the specificdetails shown and described, as long as they are within the spirit orscope of the claim.

Figures 1 and 2 represent face views of locking hinges embodying myinvention.

Figures 3 and 4 represent perspective views of the opposite members ofthe hinge separated and on an enlarged scale.

Figure 5 represents a transverse section on line 5-5 Figure 8.

Figure 6 represents a on line 6-6 Figure 4.

Figures 7-13 inclusive represent top diagrammatic views showing thedifferent positions in which the butts may be placed, and the hingeaccordingly locked in said positions.

Similar corresponding parts in the figures.

transverse section numerals of reference indicate Referleaves or buttsof the hinges, and 2 designates the knuckles thereof, said knucklesbeing connected by a pintle as usual. On the upper and lower terminalsof said knuckles of one butt are the tongues 8 and the grooves 4 whichalternate with said tongues, it being noticed that in Figures 1, 3, and5, two of said grooves extend parallel with the butt 1, and two of saidgrooves extend at a right angle to said butt. This places thealternating tongues 3 oblique to said butt.

In Figures 2, 4, and 6, two of the tongues 3 extend parallel with thebutt 1, and two of said tongues extend at a right angle to said butt.This places the alternating grooves oblique to said butt.

Now taking two butts with the knuckles as formed in Figures 3 and 4, andconnecting them with the pintle, the butts may turn as usual as in ahinge, the tongues passing 1 designates the each other until the desiredposition of the butts is obtained. Then one of the butts is moved sothat the tongues of one register with the grooves of the other, thuslocking the butts and preventing movement thereof. The butts may thus befully closed and locked thereat as in Figure 7, opened and locked topartial extent as in Figure 8, fully opened and looked as in Figure 9,say for tops or covers of talking machine cabinets. In the case of adesk lid, or other article on which a hinge is used one of the butts maybe turned over to a greater extent from the position shown in Figure 9,to that shown in Figure 10.

Again, by taking two butts both having its knuckles equipped with thetongues and grooves as in Figures 3 and 5, or by taking two butts bothhaving its knuckles equipped with the tongues and grooves as in Figures4 and 6, the butts may be placed in various intermediate positions andlocked thereat, as in Figures 11, 12 and 13 according as it may bedesired to open or close a cabinet cover, a lid, or another article onwhich a hinge is used.

To close a hinge, the butts are moved sufficiently to remove the tonguesfrom the grooves, thus unlocking said tongues when the butts may beturned with the article to which the hinge is applied and secured, andthe butts then moved to cause interengagement of the tongues andgrooves, and thus the hinge is locked in the position to which the buttsand the article are placed when closed.

It is to be particularly noted that this hinge is designed for use withcabinet Work wherein the lid, covers or doors are generally or oftenhinged on a horizontal line so that the cover will swing in a verticalplane and as the articles included in cabinet work are often placedclose to the walls of a room it is desirable that the hinge shall lockwhen one of its butts is moved lengthwise in either direction toovercome the necessity of reversing the article where a wall mayinterfere with the locking of its cover if moved toward one side. WhileI am aware that looking hinges for doors and the like have beenheretofore used and patented I do not know of a hinge particularlyadapted for cabinet work one butt of which may be moved to either sidefor completing the locking thereof in any one of a number of positions.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

A looking hinge comprising a pair of butts, one of said butts having apair of 5 spaced knuckles, radially arranged alternate tongues andgrooves on the inner terminals or edges of said knuckles, said grooveslying at right angles on planes extending obliquely to the planeoccupied by the hinge butt,

1 a knuckle carried by the other hinge butt for disposition between theknuckle of the first mentioned hinge butt, radially disposed alternatetongues and grooves on both terminals or edges of the second mentionedknuckle, certain of said grooves lying on a plane parallel to the hingebutt With adjacent grooves lying at right angles thereto, and a pinconnecting the hinge butts in slidable relation. v

JOHN W. MUMFORD,

